Introduction to Management Science 12th Edition by Bernard Taylor

Exercise 35

The department of management science at Tech has sampled 250 of its majors and compiled the following frequency distribution of grade point averages (on a 4.0 scale) for the previous semester:
The sample mean ( x ) for this distribution is 2.5, and the sample standard deviation ( s ) is 0.72. Determine whether the student GPAs are normally distributed, using a.05 level of significance (i.e., =.05).